btjrnham and wllsott -



J. W. BURNHAM 8p W; GQNLONQ POTATO BIGGER,

No. 78,257@ Patented May 26,1868.

Letters .PatentNm 782257, @lated May 26,186.8. l

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Be it known that we, Jo n N W. BunNnAM and WrLsoN'CoNLoN,of Middletoivn'Poiat, ih the county` iff Miou-T i mouth, andStuteof N ew'd'ersey, have invented a new and improved'Potato-Digger; and'w do hereby declare that thefoll-owing is a full, clear, and exact description thereof, which will enable those skilledi'n thefart' t malte-"and use the saine, reference being had" to the accompanying drawings, forinjng purt,o,this specification, inwhieh-A f i n Figure fep'resents a vertical longitudinal section 'of' o'u'r' invention, taken inthe li'nc :n zalig. 2. -Figure 2 is a vplan or top`view-of.the sain; Sinlilnrlctters of reference indicate corresponding parts. 4 This invention rela-tes to anew potatofdigger, lwhich is so,l arranged ,that thek scoop may be placed ut any desired angle, and may hev raised and loweredat wilhjndependent of theframcto which the lower roller, holding the endless apron,\is secured, although the latter franiq may' also`beraised-orlowered at will.

The'invention consists in the devices for raisingthe apron and scoop,and the scoop alone; Valso in the com' struction of the frame in which the lower apron-roller has its bearings. y f A represents the main frame of the machine. i l r The same consists of two longitudinal bars a, and of two or morecross-bars lz b', as shown.

From the sides of the bars a `project. short pins c, which receive the driving-wheels B B, no main axlebein'g ,employed in this machine. i

C i's a roller, having its bearings in the .bars a, or in plates d, projecting from the sume.

It receives rotary motion by means of gear-wheels e, or their equivalents, from one ofthe wheels B.

A frame,rD, consisting of two side-platesff, and suitable braces gg, is sus'l'ne'ndedfrom` the roller C, so that litcan turn nrou'nd thesame, and has, .at its lower end, curvedprojections h, which move Yin curvedguides E E, that are secured vtothe frente A. Y

The curves- It and E are described -from the axis of:4 the roller C 'as their contre.

Inthe lower part of: the frame D is hung a horizontal fr'oller, F, asshown.

An endless apron, G, is laid around tho rollcrs and Fles shown. Y l

.I Hris'a scoop, having'iianges z' at the sides, said flanges being pivotedtothe side-plates of thejfranro -Dt I is a shaking-frame, suspended, behind thc upper end of the apron, from cranksj of an axle, J, which receives -dsillhting motion by means of a rod, k, from the axle C.

A shaking motion is thus impartedto the sieve or grate-frame I.-

, The operation of the machine is sirnple and easy understood.-

As it is being drawn ahead, the scoop raises thepotnt'oes and the dirt, andV `conve'iys themtojthe apron, by which theyare raised and thrown upon the frame I, which separates the potatoes'froxn the dirt, and discharges the former either into a suitable receptable riding behind the machine, or uponthe topof the furrowsywhence they can be easily pickedmp. i l 4 i The frame D is, by means-of a. bar, l, connected with an arm, m, that projects froth a lever,- L, which is pivoted to a'plate projecting from the frame i Thelever L carries a bolt, n, which can be pushed between the teeth of a ratchet, o, and th'us the lever can be locked iu any desired position. v i

When the lever L is unlocked,- it can be turned so'as to raise or lower the frame 1 thereby varying u t will the height of the axle Fb and of the pivots of the scoop, and, consequently, also,`the inclination of the pron G.

From one, flange z' of the scoop H projects an arm, p, which is, by means of a lever, rconnected with nn arm, s, projectingfrom a lever, M, which is pivoted to a plate projecting from the frarhe A.

The lever M carries aybolt, t,"1'vhich can be. pushed between the teeth of. a. ratchet, w, as shown, and thus the lever can be locked in any desired position.

pojeotions It', ,moving iii oni'iiedvgixide's E, as sot ortli.

v '1s 2st: e 2 .1 A, When thelever 'M is nnloolxoil! can be tnx-nod so 'as totnrn 'tli'e's'ooop' oronndvits pivot, io regulate tho position of tho scoop wthout'irterfering-ith the position of the fiume D and apron GL' Instead of bengthus simply connected with the scoop III, the lever M may be eonnecteclk with u horizontal shaft, N, from each end of whichbnrs S .S projeot, so that greater. security o'f operotion'is obtained;

In n similar manner may the lever L be connected with a. shaft, 03m/bien carries nn arm, m, at cavoli end,` Y

as shown in iig. -2.

We clnim .neuem-and desire toseoure by Letters'Paten-tf- `1. Conneotn'g theoscillnting-frsms il),y which' oo ie's the- 4loyer apron-roller F unil tho seoop' by `menne of. n rod and crank, iithn lever?, L, eo that the position of the apron and scoop cnn be odjusteti at once, ss

set forth. f 'Y Y I A Y V The errnngemsnt and colnbinstionlwith enel; mlmof thel roller C, o!oillnjiing-frnuuaD,` roller F, apro'n G, scoop H, r'ods and r a, und' levers and M, nl l mudo and operating substantially as herein shown und aemibea.

8. vProvidingtlua 'lovfm pnrtof the -funnel);which` entries the endless n plfon 'and thosooop, with curvedA i JOHN .W- 'BURNHAMg-s WILSON CONLON.

Witnesses; r f 

